import sys
input=sys.stdin.buffer.readline
import os 
from math import*


x=[400,600,800,1000,1200,1400,1600,1800,2000]
n=int(input())
for i in range(len(x)):
	if n<x[i]:
		print(9-i)
		break import sys sys input=sys.stdin.buffer.readline input sys.stdin.buffer.readline sys.stdin.buffer sys.stdin sys stdin buffer readline import os os from math import* x=[400,600,800,1000,1200,1400,1600,1800,2000] x [400,600,800,1000,1200,1400,1600,1800,2000] 400 600 800 1000 1200 1400 1600 1800 2000 n=int(input()) n int(input()) int input() input for i in range(len(x)):
	if n<x[i]:
		print(9-i)
		break i range(len(x)) range len(x) len x if n<x[i]:
		print(9-i)
		break n<x[i] n x[i] x i print(9-i) print 9-i 9 i break n=int(input()) int(input()) n input=sys.stdin.buffer.readline sys.stdin.buffer.readline input x=[400,600,800,1000,1200,1400,1600,1800,2000] [400,600,800,1000,1200,1400,1600,1800,2000] x
import sys
input=sys.stdin.buffer.readline
import os 
from math import*


x=[400,600,800,1000,1200,1400,1600,1800,2000]
n=int(input())
for i in range(len(x)):
	if n<x[i]:
		print(9-i)
		break